A method for closing the large hanging cylinder of a wind turbine ship in sections

Abstract

The invention relates to the technical field of cylinder segment closure, and in particular to a method for closure of a large cylinder segment of a wind turbine ship, comprising the steps of constructing n segments assembled into a cylinder; laying out a support frame, and supporting and placing a flange on the support frame; simulating closure of the n segments on the flange; hoisting and assembling the n segments on the flange in sequence; welding the vertical seams of the cylinder at the joints between the segments to form a cylinder; and welding the contact between the lower end of the cylinder and the upper end of the flange. The invention effectively controls welding deformation, and improves the stability and safety of closing the cylinder segments.

Description

Technical Field

[0001] The invention relates to the technical field of cylinder segment closing, and in particular to a method for closing a large crane cylinder segment of a wind turbine ship. Background Art

[0002] On the wind turbine installation ship, the cylinder segment at the bottom of the flange is composed of five segments, namely CP4B, CP4C, CP4E, CP4F, and CP4G, which form a cylindrical shape and are used to connect the flange and the round-and-square-structure of the large crane. The quality and efficiency of its construction are determined by the craftsmanship and safety control during the construction and assembly process.

[0003] In the existing process, the closing process of the cylinder segments and the flange includes: directly hoisting and assembling the cylinder segments in sequence, then welding the butt joints between the cylinders, and finally welding the cylinder and the flange. In the above process, the cylinder segments are arc-shaped, the closing gap between the cylinder segments is out of tolerance, and the welding deformation is difficult to control. Summary of the invention

[0004] In view of this, the purpose of the present invention is to propose a method for closing the large hanging cylinder of a wind turbine ship in sections, so as to solve the problems of excessive closing gap between cylinder sections and difficult to control welding deformation.

[0005] Based on the above purpose, the present invention provides a method for closing the large hanging cylinder of a wind turbine ship in sections.

[0006] Construct n segments to assemble into a cylinder;

[0007] Laying out a supporting tire frame, and supporting and placing a flange on the supporting tire frame;

[0008] Simulate closing of n segments on the flange;

[0009] After the simulated closing, the n segments are hoisted and assembled onto the flange in sequence;

[0010] The vertical seams of the cylinder at the joints between the segments are welded to form a cylinder;

[0011] Weld the contact point between the lower end of the cylinder and the upper end of the flange.

[0012] Optionally, the supporting tire frame includes sixteen tire frame nodes, and eight flange butt seams are arranged on the flange. The flange is supported by a tire frame node on both sides of each flange butt seam.

[0013] Optionally, the simulation of closing the n segments on the flange includes: marking the position, arc length of the outer contour line and vertical seam of each segment on the flange, checking whether the segment gap between the segments meets the WPS requirements, and fine-tuning the actual lifting positioning of the segments according to the segment gap between the above simulated segments, so that the closing groove gap meets the WPS requirements.

[0014] Optionally, before the segments are hoisted, a vertical support is provided on the inner side of the flange, and the upper end of the vertical support is used to pre-support the segments that are subsequently hoisted onto the flange.

[0015] Optionally, after each of the first n-1 segments is hoisted into place, the outer sides of the segments hoisted into place are supported by providing inclined supports.

[0016] Optionally, before each segment is hoisted and unhooked, the lower ends of the front and rear sides of the segment are welded to the flanges at multiple locations by positioning welding.

[0017] Optionally, before each segment is hoisted and unhooked, a plurality of horse plates are evenly distributed at the closing openings between the segments.

[0018] Optionally, the number n of construction segments is not less than five.

[0019] Optionally, the cylinder body vertical seams at the joints between the segments are welded to form a cylinder, including: there are n cylinder body vertical seams, the n cylinder body vertical seams are arranged in order in a ring, the n cylinder body vertical seams are divided into two upper and lower sections for two groups of welding, the welding length of each section is half of the height of the cylinder, and when the n cylinder body vertical seams of each group are welded, after welding one of the cylinder body vertical seams, a cylinder body vertical seam that is not adjacent to this cylinder body vertical seam is selected for welding until all the cylinder body vertical seams are welded.

[0020] Optionally, the contact between the lower end of the cylinder and the upper end of the flange is welded, including: the contact is an annular weld, the annular weld is divided into six large sections, and the sections are welded simultaneously, the large section is divided into seven small sections from left to right, namely the first section, the second section, the third section, the fourth section, the fifth section, the sixth section and the seventh section, and the welding order of each large section is the first section, the third section, the fifth section, the seventh section, the second section, the fourth section and the sixth section.

[0021] Beneficial effects of the present invention: The present invention provides a method for closing the segments of a large crane barrel of a wind turbine ship. The method uses the support frame of the flange as a support for the segments, thereby improving the utilization rate of the support frame. In addition, the support frame ensures the stability and safety of the flange and barrel segment closing production process, and simulates the closing of the flange to improve the success rate of closing the subsequent segments on the flange, reduce the possibility of exceeding the closing gap between the barrel segments, and further control the subsequent welding deformation, facilitate the closing of the barrel segments, and improve the stability and safety of the closing of the barrel segments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the segmented structure of the present invention;

[0024] Figure 2 It is a structural schematic diagram of the vertical seam on the cylinder of the present invention;

[0025] Figure 3 It is a structural schematic diagram of the support tire frame of the present invention;

[0026] Figure 4 It is a structural schematic diagram of a tire frame node of the present invention;

[0027] Figure 5 This is a schematic diagram of the structure of the vertical support and the oblique support of the present invention supporting the segments;

[0028] Figure 6 It is a partial structural schematic diagram of the connection between the cylinder and the flange of the present invention;

[0029] Figure 7 It is a schematic diagram of the structure of the segmented simulated closure of the present invention.

[0030] In the figure: 1. Segment; 2. Outer plate; 3. Arc-shaped top plate; 4. Support frame; 5. Frame node; 6. Flange; 7. Vertical support; 8. Oblique support; 9. First vertical seam; 10. Second vertical seam; 11. Third vertical seam; 12. Fourth vertical seam; 13. Fifth vertical seam; 14. Closure; 15. Positioning weld; 16. Horse plate; 17. Segment gap. DETAILED DESCRIPTION

[0031] In order to make the objectives, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.

[0032] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the embodiments of the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The "first", "second" and similar words used in the present invention do not represent any order, quantity or importance, but are only used to distinguish different components. "Including" or "comprising" and similar words mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connecting" or "connected" and similar words are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] like Figures 1 to 7 As shown, a method for closing the large hanging cylinder of a wind turbine ship in sections,

[0034] Construct n segments 1 that are assembled into a cylinder;

[0035] Laying out a support tire frame 4, and supporting and placing a flange 6 on the support tire frame 4;

[0036] The n segments 1 are simulated closed on the flange 6;

[0037] After the simulated closing, the n segments 1 are hoisted and assembled onto the flange 6 in sequence;

[0038] The vertical seams of the cylinder at the joints between the segments 1 are welded to form a cylinder;

[0039] The contact point between the lower end of the cylinder and the upper end of the flange 6 is welded.

[0040] In this method, the support frame 4 of the flange 6 is also used as the support of the segment 1, so as to improve the utilization rate of the support frame 4. In addition, the support frame 4 ensures the stability and safety of the closing process of the flange 6 and the cylinder segment 1. When the flange 6 is simulated closed, the success rate of the subsequent closing of the segment 1 on the flange 6 is improved, so that the gap between the cylinder segments can be controlled to avoid the occurrence of excessive closing gaps, and further the subsequent welding deformation can be controlled, which is convenient for the closing of the cylinder segment 1 and improves the stability and safety of the closing of the cylinder segment 1.

[0041] Embodiment 1, as Figures 1 to 7 As shown, a method for closing the large hanging cylinder of a wind turbine ship in sections,

[0042] Step 1, constructing a plurality of segments 1 assembled into a cylinder;

[0043] The outer plate 2, the support plate, the curved top plate 3 and the curved inner plate are obtained by cutting with a flame cutting machine;

[0044] Segment 1 includes an outer plate 2, a plurality of support plates are assembled at equal intervals on the inner side of the outer plate 2, an arc-shaped top plate 3 connected to the support plates is assembled on the upper end of the outer plate 2, and an arc-shaped inner plate is arranged on the inner side of the arc-shaped top plate 3, thereby assembling into segment 1;

[0045] Among them, the thickness of outer plate 2 is 70mm. When cutting to obtain outer plate 2, the cutting team conducts a start-up test plate test and an equipment running accuracy test in each shift according to the precision management requirements to control the flatness, cross-sectional angle and main dimensions of the outer plate 2 cutting;

[0046] Open grooves at both ends of section 1, check the groove marks on outer plate 2 and compare with the nesting drawing, open the groove, and after opening a section (200mm), determine the actual angle size, and control the range within ±2°, and then continue opening;

[0047] When the outer plate 2 is obtained by cutting, the arc of the outer plate 2 of the segment 1 is given a certain amount of reverse deformation according to the welding deformation of 0.5mm / 1000mm;

[0048] When the outer plate 2 is obtained by cutting, the closing opening 14 on both sides of each segment 1 is compensated by about 3 mm according to the welding deformation, so as to offset the closing gap tolerance and cutting error caused by the reverse deformation added during the production of the tire frame.

[0049] Step 2: Arrange the support frame 4, and support and place the flange 6 on the support frame 4;

[0050] A supporting tire frame 4 is arranged on the ground, and the supporting tire frame 4 includes sixteen tire frame nodes 5. A flange 6 is supported on the supporting tire frame 4, and eight flange butt seams are arranged on the flange 6. Each flange butt seam is supported by a tire frame node 5 on both sides. The tire frame node 5 is arranged to ensure the strength of the flange 6 welding. The tire frame node 5 is made of a gantry type tire frame in the form of a combination of I-beams.

[0051] To ensure the stability of the tire frame node 5, each tire frame node 5 needs to be welded to the embedded iron. In addition, the tire frame node 5 must be additionally reinforced with diagonal braces of L75 angle steel or above. The design of the tire frame node 5 ensures the stability and safety of the manufacturing process of the flange 6 and the segment 1 being combined into a cylinder.

[0052] The order of the above steps 1 and 2 can be reversed, or steps 1 and 2 can be performed simultaneously.

[0053] Step 3: Simulate closing of the multiple segments 1 on the flange 6;

[0054] Mark the position, arc length of the outer contour and vertical seam of each segment 1 on the flange 6, check whether the segment gap 17 between segments 1 meets the WPS requirements, and fine-tune the actual lifting positioning of segment 1 according to the simulated segment gap 17 between segments 1 to make the closing groove gap meet the WPS requirements.

[0055] Step 4: A vertical support 7 is vertically arranged inside the flange 6. The upper end of the vertical support 7 is used to pre-support the segment 1 subsequently hoisted onto the flange 6. The vertical support 7 is an H200 I-beam.

[0056] Step 5: hoist and assemble segment 1 onto flange 6.

[0057] Step 6: Set up the oblique support 8 to support the outer side of the segment 1 that has been hoisted into place;

[0058] After each segment 1 is hoisted into place, the outer side of the segment 1 is reinforced with an inclined support 8, and the inclined support 8 is inclined. The outer side of the last segment 1 does not need to be installed with the inclined support 8, and the inclined support 8 is an H200 I-beam.

[0059] When the cylinder segment 1 is closed, the flange 6 is used as the tire, and the weight of the overall structure reaches 315 tons. The contact surface between the flange 6 and the supporting tire frame 4 is narrow, and the supporting tire frame 4 is locally subjected to large force. In order to ensure stability and safety during production, the segment 1 is supported by providing vertical supports 7 in step four and oblique supports 8 in step six. This design ensures the stability and safety of the closing production process of the flange 6 and the cylinder segment 1, and reduces the risk of the segment 1 tipping over.

[0060] Step 7. Before hoisting and unhooking segment 1, the lower front end and the lower rear end of segment 1 are welded to the flange 6 with five tack welds 15. The five tack welds 15 are arranged at equal intervals, and the length of each tack weld 15 is 200 mm. Each closing opening 14 between the cylinder segments 1 should be evenly distributed with three horse plates 16 for sealing. This arrangement further reduces the risk of segment 1 tipping over.

[0061] Step 8: welding the vertical seams of the cylinder at the joints between the segments 1 to form a cylinder;

[0062] The number n of segments 1 may be no less than five, there are n vertical seams of the cylinder, the n vertical seams of the cylinder are arranged in order in a ring, the n vertical seams of the cylinder are divided into two upper and lower sections for two groups of welding, the welding length of each section is half of the height of the cylinder, when each group of n vertical seams of the cylinder are welded, after welding one of the vertical seams of the cylinder, a vertical seam of the cylinder that is not adjacent to the vertical seam of the cylinder is selected for welding until all the vertical seams of the cylinder are welded;

[0063] If there are five sections 1, there are five vertical seams on the cylinder, namely the first vertical seam 9, the second vertical seam 10, the third vertical seam 11, the fourth vertical seam 12, and the fifth vertical seam 13, and they are arranged in this way. The first vertical seam 9, the second vertical seam 10, the third vertical seam 11, the fourth vertical seam 12, and the fifth vertical seam 13 are arranged around the cylinder in sequence, the first vertical seam 9 is adjacent to the fifth vertical seam 13, and the vertical seam of the cylinder is divided into two upper and lower sections for two groups of welding. The welding length of each section is half of the height of the cylinder, and the welding sequence of each group is the first vertical seam 9, the third vertical seam 11, the fifth vertical seam 13, the second vertical seam 10, and the fourth vertical seam 12.

[0064] Step nine, welding the cylinder and the flange 6;

[0065] The annular weld at the contact point between the cylinder and the flange 6 is welded, and the annular weld is equally divided into six large sections, which are welded simultaneously. The large section is divided into seven small sections from left to right, namely, the first section, the second section, the third section, the fourth section, the fifth section, the sixth section and the seventh section. The welding order of each large section is the first section, the third section, the fifth section, the seventh section, the second section, the fourth section and the sixth section.

[0066] The total length of the circular weld is about 63m, which is divided into six large sections. There is one welder in each section, and a total of six welders weld simultaneously. Each large section is about 10.5m and each small section is about 1.5m.

[0067] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention is limited to these examples. The present invention is not limited to the above-mentioned implementation modes, that is, it does not mean that the present invention must rely on the above-mentioned methods and structures to be implemented. Under the concept of the present invention, the technical features in the above embodiments or different embodiments can also be combined, the steps can be implemented in any order, and there are many other variations of different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0068] The embodiments of the present invention are intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A method for closing the large hanging cylinder of a wind turbine ship in sections, characterized in that: include: Constructing n segments (1) assembled into a cylinder; Arranging a supporting tire frame (4), and supporting and placing a flange (6) on the supporting tire frame (4); The n segments (1) are simulated closed on the flange (6), including: Mark the position, arc length of the outer contour line and vertical seam of each segment (1) on the flange (6), check whether the segment gap (17) between the segments (1) meets the WPS requirements, and fine-tune the actual lifting positioning of the segments (1) according to the above-mentioned simulated segment gap (17) between the segments (1) so that the gap of the closed groove meets the WPS requirements; After the simulated closing, the n segments (1) are hoisted and assembled onto the flange (6) in sequence; The vertical seams of the cylinder at the joints between the segments (1) are welded to form a cylinder: The method comprises: the number n of the construction sections (1) is not less than five, the number of cylinder vertical seams is n, the n cylinder vertical seams are arranged in a circular manner in order, the n cylinder vertical seams are divided into two groups of upper and lower sections for welding, the welding length of each section is half of the height of the cylinder, and when welding the n cylinder vertical seams of each group, after welding one of the cylinder vertical seams, a cylinder vertical seam not adjacent to the cylinder vertical seam is selected for welding until all the cylinder vertical seams are welded; The contact point between the lower end of the cylinder and the upper end of the flange (6) is welded.

2. A method for assembling a large hanging cylinder of a wind turbine ship in sections according to claim 1, characterized in that: The supporting tire frame (4) comprises sixteen tire frame nodes (5), and eight flange butt joints are arranged on the flange (6). The flange (6) is supported by a tire frame node (5) on both sides of each flange butt joint.

3. The method for assembling a large hanging cylinder of a wind turbine ship in sections according to claim 1 is characterized in that: Before the segment (1) is hoisted, a vertical support (7) is arranged vertically on the inner side of the flange (6), and the upper end of the vertical support (7) is used to pre-support the segment (1) that is subsequently hoisted onto the flange (6).

4. A method for assembling a large hanging cylinder of a wind turbine ship in sections according to claim 1, characterized in that: After each of the first n-1 segments (1) is hoisted into place, the outer sides of the segments (1) hoisted into place are supported by providing inclined supports (8).

5. The method for assembling the large suspension cylinder of a wind turbine ship in sections according to claim 1 is characterized in that: Before each segment (1) is hoisted and unhooked, the lower ends of the front and rear sides of the segment (1) are welded to the flange (6) by multiple positioning welds (15).

6. A method for assembling a large hanging cylinder of a wind turbine ship in sections according to claim 5, characterized in that: Before each segment (1) is hoisted and unhooked, a plurality of horse plates (16) are evenly distributed on the closing opening (14) between the segments (1).

7. The method for assembling a large suspension cylinder of a wind turbine ship in sections according to claim 1 is characterized in that: The welding of the contact point between the lower end of the cylinder and the upper end of the flange (6) comprises: The contact point is an annular weld, which is divided into six large sections and welded simultaneously. The large section is divided into seven small sections from left to right, namely the first section, the second section, the third section, the fourth section, the fifth section, the sixth section and the seventh section. The welding order of each large section is the first section, the third section, the fifth section, the seventh section, the second section, the fourth section and the sixth section.

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